CN212780766U - Online BOD monitoring devices that can be used to open air - Google Patents
Online BOD monitoring devices that can be used to open air Download PDFInfo
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- CN212780766U CN212780766U CN202021238486.XU CN202021238486U CN212780766U CN 212780766 U CN212780766 U CN 212780766U CN 202021238486 U CN202021238486 U CN 202021238486U CN 212780766 U CN212780766 U CN 212780766U
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Abstract
The utility model discloses a can be used to open air online BOD monitoring devices, including the multi-way valve, the multi-way valve respectively with the syringe pump, the seventh container, the fourth container, the fifth container, the tank, first container, the second container, the third container is connected, fourth container and fifth container are connected with two switching ends of first diverter valve respectively, the stiff end and the sixth container of second diverter valve are connected with two switching ends of second diverter valve respectively, the stiff end and the inlet of BOD short-term test appearance of second diverter valve are connected, the water sample is connected with the inlet of immersible pump, the play end of immersible pump passes through filter and tank intercommunication. The utility model also discloses an online BOD monitoring method that can be used to the open air, the utility model discloses full-automatic on-line monitoring can be realized. The problem of dilution of the sample liquid and the standard liquid is solved, and the sample liquid and the standard liquid can be automatically diluted. The device can be operated outdoors for a long time on line, and the detection index can be expanded according to the requirement.
Description
Technical Field
The utility model belongs to the technical field of intelligent substation inspection method, concretely relates to online BOD monitoring devices who can be used to the open air still relates to an online BOD monitoring methods who can be used to the open air.
Background
BOD is an important index for water environment pollution evaluation, and the BOD index is mainly detected by a five-day culture method and a microbial membrane method at present. BOD5The method is more conventional, and the conventional BOD5The assay has serious drawbacks: the culture needs to be carried out for 5 days under the constant temperature condition of 20 ℃, the workload is large, the operation is complicated, the number of interference factors is large, the repeatability is poor, large errors exist, special training is quite high in requirement, and the change condition of the water quality cannot be reflected in time. The microbial film method is another mainstream detection method at present, and corresponding laboratory rapid detection instruments are developed according to the existing part of manufacturers on the market of the microbial film method at present. The rapid detection instrument of the microbial film method can solve the detection consumption of a BOD five-day culture methodThe method has the problems of long time and complicated work, but the microbial film method rapid detection instrument still cannot meet the requirement of outdoor BOD online detection. Due to the particularity of the BOD index, there is no online monitoring device at present, and the following reasons can mainly be summarized:
the BOD detection must have microorganisms to participate in the reaction, the activity of the two microorganisms is changed, so the calibration is needed at intervals, and the conventional BOD standard solution is not stable and needs to be prepared for use.
The high-concentration BOD sample solution to be measured needs to be diluted before measurement, and the dilution times need to be judged in advance.
Therefore, the existing methods and devices in the BOD detection process have many places which need manual operation to realize, so that no online BOD detection device is available in the market.
In addition to the above-described biosensor method, BOD is also rapidly measured by using a method such as a microbial reactor, a mediator method, a microbial fuel cell, or the like. The scientific aim of the methods is to solve the core problems of small quantity of microorganisms, single type, low degradation efficiency on organic matters, high selectivity, poor environmental adaptability and the like, and further hope to obtain a test result more consistent with BOD 5. The scientific exploration of these methods has made a series of advances, but has brought some new problems that the sensor method has not. So that the method is not popularized in the market.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that overcome prior art's defect, provide one kind and can be used to open air online BOD monitoring devices, still provide one kind and can be used to open air online BOD monitoring method. Realize automatic BOD detection, solve BOD's on-line monitoring problem.
In order to solve the technical problem, the utility model discloses the technical scheme who adopts is:
the utility model provides a can be used to open air online BOD monitoring devices, including the multi-way valve, the multi-way valve respectively with the syringe pump, the seventh container, the fourth container, the fifth container, the tank, first container, the second container, the third container is connected, fourth container and fifth container are connected with two switching ends of first diverter valve respectively, the stiff end of second diverter valve and sixth container are connected with two switching ends of second diverter valve respectively, the stiff end of second diverter valve is connected with BOD short-term test appearance's inlet, the water sample is connected with the inlet of immersible pump, the play end of immersible pump passes through filter and tank intercommunication.
The water storage tank is connected with the discharge port through the first control valve, two switching ends of the third switching valve are respectively connected with the discharge port and the sixth container, and the fixed end of the third switching valve is connected with the liquid discharge port of the BOD rapid detector.
The mesh number of the filter is 20-100 meshes.
And a cleaning solution is arranged in the sixth container, and is a phosphate solution.
An on-line BOD monitoring method applicable to outdoor comprises the following steps:
step 1, pumping a water sample to a water storage tank by using a submersible pump, and standing the water sample in the water storage tank for 5-30 min;
step 2, controlling the multi-way valve to conduct the injection pump and the first container, the injection pump extracts a certain amount of calibration liquid, the multi-way valve is controlled to conduct the injection pump and the fourth container, the injection pump injects the extracted calibration liquid into the fourth container, the multi-way valve is controlled to conduct the injection pump and the second container, the injection pump extracts a certain amount of buffer liquid, the multi-way valve is controlled to conduct the injection pump and the fourth container, the extracted buffer liquid is injected into the fourth container, the multi-way valve is controlled to conduct the injection pump and the third container, the injection pump extracts a certain amount of clear water, the multi-way valve is controlled to conduct the injection pump and the fourth container, the clear water is injected into the fourth container, and the air: controlling the multi-way valve to conduct the seventh container and the injection pump to pump air, controlling the multi-way valve to conduct the injection pump and the fourth container, injecting the air into the fourth container, and repeating the air injection and stirring steps for a plurality of times;
step 3, switching the first switching valve and the second switching valve to enable the fourth container to be communicated with a liquid inlet of the BOD rapid detector, and extracting the standard liquid from the fourth container by the BOD rapid detector to perform calibration work;
step 4, controlling the multi-way valve to conduct the injection pump and the water storage tank, enabling the injection pump to extract a certain amount of sample liquid, then controlling the multi-way valve to conduct the injection pump and the fifth container, enabling the injection pump to inject the extracted sample liquid into the fifth container, controlling the multi-way valve to conduct the injection pump and the second container, enabling the injection pump to extract a certain amount of buffer liquid, controlling the multi-way valve to conduct the injection pump and the fifth container, enabling the extracted buffer liquid to be injected into the fifth container, controlling the multi-way valve to conduct the injection pump and the third container, enabling the injection pump to extract a certain amount of clear water, controlling the multi-way valve to conduct the injection pump and the fifth container, enabling the clear water to be: controlling the multi-way valve to conduct the seventh container and the injection pump to pump air, controlling the multi-way valve to conduct the injection pump and the fifth container, injecting air into the fifth container, and repeating the air injection and stirring steps for a plurality of times;
and 5, switching the first switching valve and the second switching valve to enable the fifth container to be communicated with a liquid inlet of the BOD rapid detector, and extracting the sample liquid from the fifth container by the BOD rapid detector to perform determination work.
An outdoor online BOD monitoring method further comprises the following pipeline cleaning steps: except for the extraction and injection of the clean water of the third container by the injection pump and the extraction and injection of the air of the seventh container by the injection pump, after each extraction and injection of the injection pump, the multi-way valve is controlled to conduct the third container and the injection pump, clean water is extracted, the multi-way valve is controlled to conduct the injection pump and the seventh container, and the water extracted by the injection pump is discharged to the seventh container.
An outdoor online BOD monitoring method further comprises the following steps: after the measurement or calibration is finished, the second switching valve is switched to enable the sixth container to be communicated with the liquid inlet of the BOD rapid detector, the third switching valve is switched to enable the liquid outlet of the BOD rapid detector to be communicated with the liquid outlet, the BOD rapid detector extracts cleaning liquid in the sixth container to be cleaned, the cleaned cleaning liquid is discharged to the liquid outlet, the third switching valve is switched to enable the liquid outlet of the BOD rapid detector to be communicated with the sixth container after the cleaning liquid is continuously used for a plurality of minutes, and the cleaning liquid is continuously circulated in the BOD rapid detector until the next measurement or calibration is finished.
Compared with the prior art, the utility model, following beneficial effect has:
1. on-line BOD monitoring equipment is not available in the market, and the device can realize full-automatic on-line monitoring.
2. The utility model provides a dilution problem of appearance liquid and mark liquid, the dilution of carrying out appearance liquid and mark liquid that can automize.
3. The utility model discloses can be in outdoor long-term online operation, the detection index can expand according to the demand.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
To facilitate understanding and practice of the invention by those of ordinary skill in the art, the following detailed description of the invention is provided in connection with the examples, and it is to be understood that the examples described herein are for purposes of illustration and explanation only and are not intended to limit the invention.
Example 1:
the utility model provides a can be used to open air online BOD monitoring devices, including the multi-way valve, the multi-way valve respectively with the syringe pump, the seventh container, the fourth container, the fifth container, the tank, first container, the second container, the third container is connected, fourth container and fifth container are connected with two switching ends of first diverter valve respectively, the stiff end of second diverter valve and sixth container are connected with two switching ends of second diverter valve respectively, the stiff end of second diverter valve is connected with BOD short-term test appearance's inlet, the water sample is connected with the inlet of immersible pump, the play end of immersible pump passes through filter and tank intercommunication.
The first connecting end, the second connecting end, the third connecting end, the fourth connecting end, the fifth connecting end, the sixth connecting end, the seventh connecting end and the eighth connecting end of the multi-way valve are respectively connected with the injection pump, the seventh container, the fourth container, the fifth container, the water storage tank, the first container, the second container and the third container, and the first connecting end can be respectively communicated with the second connecting end, the third connecting end, the fourth connecting end, the fifth connecting end, the sixth connecting end, the seventh connecting end and the eighth connecting end through the multi-way valve.
The first switching valve can realize that one of them switching end communicates with the stiff end, and the second switching valve can realize that one of them switching end communicates with the stiff end.
The reservoir is connected with the drain through a first control valve, two switching ends of the third switching valve are respectively connected with the drain and a sixth container, and the fixed end of the third switching valve is connected with a liquid discharge port of the BOD rapid detector.
The third switching valve can realize that one of the switching ends is communicated with the fixed end.
The mesh number of the filter is 20-100 meshes.
The cleaning solution is phosphate solution.
The BOD rapid detector can adopt BOD-220B.
An outdoor online BOD monitoring method, which utilizes the outdoor online BOD monitoring device, comprises the following steps:
step 1, taking water, pumping out water in a water sample by the operation of a submersible pump, and enabling the water sample to enter a water storage tank through a filter. And standing the water sample in a water storage tank for 5-30 min.
Step 2, diluting a standard solution, controlling a multi-way valve to conduct an injection pump and a first container, pumping a certain amount of the standard solution (0.2-1 ml unequal) by the injection pump, controlling the multi-way valve to conduct the injection pump and a fourth container, injecting the previously pumped standard solution into the fourth container by the injection pump, controlling the multi-way valve to conduct the injection pump and the second container, pumping a certain amount of buffer solution (1-10 ml unequal) by the injection pump, controlling the multi-way valve to conduct the injection pump and the fourth container, injecting the pumped buffer solution into the fourth container, controlling the multi-way valve to conduct the injection pump and the third container, pumping a certain amount of clear water (10 ml-50 ml unequal) by the injection pump, controlling the multi-way valve to conduct the injection pump and the fourth container, injecting the clear water into the fourth container, and injecting air: the control multi-way valve switches on the seventh container and the injection pump to extract air, the seventh container is an open container and is used for receiving waste liquid and providing air for the injection pump to suck, the control multi-way valve switches on the injection pump and the fourth container to inject the air into the fourth container, and the air injection stirring step is repeated for a plurality of times to play a role in stirring and mixing the solution. The multi-way valve may be used with model number SV-06.
And 3, calibrating the BOD rapid detector, conducting the fourth container to be connected with a liquid inlet of the BOD rapid detector through switching of the first switching valve and the second switching valve, and extracting the standard liquid from the fourth container by the BOD rapid detector to perform calibration work.
Step 4, diluting the sample liquid, enabling any path out of the injection pump to be communicated with the injection pump through a multi-way valve, enabling the liquid transfer of any container through the communication of the multi-way valve and the 'extraction' and 'injection' operations of the injection pump, controlling the multi-way valve to communicate the injection pump with a water storage tank, enabling the injection pump to extract a certain amount of sample liquid (0.2-1 ml unequal), then controlling the multi-way valve to communicate the injection pump with a fifth container, enabling the injection pump to inject the sample liquid extracted before into the fifth container, controlling the multi-way valve to communicate the injection pump with a second container, enabling the injection pump to extract a certain amount of buffer liquid (1-10 ml unequal), controlling the multi-way valve to communicate the injection pump with the fifth container, injecting the extracted buffer liquid into the fifth container, controlling the multi-way valve to communicate the injection pump with a third container, enabling the injection pump to extract a certain amount of clear water (10ml, injecting clean water into a fifth container, and injecting air into the fifth container for stirring: and controlling the multi-way valve to conduct the seventh container and the injection pump to extract air, controlling the multi-way valve to conduct the injection pump and the fifth container, injecting the air into the fifth container, and repeating the air injection and stirring steps for a plurality of times to play a role in stirring and mixing the solution. And (3) extracting the sample liquid from the water storage tank, wherein the ratio of the clear water extraction volume to the sample liquid extraction volume is 0-100 times.
And 5, measuring the sample liquid of the BOD rapid detector, communicating the fifth container with a liquid inlet of the BOD rapid detector through switching of the first switching valve and the second switching valve, and extracting the sample liquid from the fifth container by the BOD rapid detector to carry out measurement.
And (2) cleaning a pipeline, wherein after the injection pump extracts and injects water every time (except for extracting and injecting clean water of the third container by the injection pump and extracting and injecting air of the seventh container by the injection pump), the multi-way valve is controlled to conduct the third container and the injection pump, clean water is extracted, the multi-way valve is controlled to conduct the injection pump and the seventh container, water extracted by the injection pump is discharged to the seventh container, and the pipeline which flows through in the previous step is cleaned respectively.
And cleaning the BOD rapid detector, switching the second switching valve after the measurement or calibration is finished to communicate the sixth container with the liquid inlet of the BOD rapid detector, switching the third switching valve to communicate the liquid outlet of the BOD rapid detector with the drain port, extracting the cleaning liquid in the sixth container by the BOD rapid detector for cleaning, discharging the cleaned cleaning liquid to the drain port, switching the third switching valve after the cleaning liquid is continuously used for several minutes (5-20 min), communicating the liquid outlet of the BOD rapid detector with the sixth container, and continuously circulating the cleaning liquid in the BOD rapid detector until the next measurement or calibration. And the third switching valve is a switching valve and is used for switching and controlling the connection of a liquid outlet of the BOD rapid detector and the discharge port, or switching and controlling the connection of the liquid outlet of the BOD rapid detector and the sixth container.
Discharging waste liquid, controlling the multi-way valve to conduct the injection pump and the fourth container, pumping redundant standard liquid, controlling the multi-way valve to conduct the injection pump and the seventh container, and discharging the standard liquid to the seventh container; and controlling the multi-way valve to conduct the injection pump and the fifth container, pumping redundant sample liquid, and controlling the multi-way valve to conduct the injection pump and the seventh container to discharge the sample liquid to the seventh container.
And in the drainage process, after the measurement or calibration and the waste liquid drainage are finished, the first control valve is opened to conduct the water storage tank and the drainage port, and the water in the water storage tank is drained through gravity flow.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Claims (2)
1. An on-line BOD monitoring device used outdoors comprises a multi-way valve and is characterized in that the multi-way valve is respectively connected with an injection pump, a seventh container, a fourth container, a fifth container, a water storage tank, a first container, a second container and a third container, the fourth container and the fifth container are respectively connected with two switching ends of a first switching valve, a fixed end and a sixth container of a second switching valve are respectively connected with two switching ends of the second switching valve, a fixed end of the second switching valve is connected with a liquid inlet of a BOD rapid detector, a water sample is connected with an inlet end of a submersible pump, an outlet end of the submersible pump is communicated with the water storage tank through a filter,
the water storage tank is connected with the discharge port through a first control valve, two switching ends of a third switching valve are respectively connected with the discharge port and a sixth container, the fixed end of the third switching valve is connected with a liquid discharge port of a BOD rapid detector,
the mesh number of the filter is 20-100 meshes.
2. The on-line BOD monitoring device as claimed in claim 1, wherein a cleaning solution is disposed in the sixth container, and the cleaning solution is phosphate solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202021238486.XU CN212780766U (en) | 2020-06-30 | 2020-06-30 | Online BOD monitoring devices that can be used to open air |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021238486.XU CN212780766U (en) | 2020-06-30 | 2020-06-30 | Online BOD monitoring devices that can be used to open air |
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| CN212780766U true CN212780766U (en) | 2021-03-23 |
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| CN202021238486.XU Active CN212780766U (en) | 2020-06-30 | 2020-06-30 | Online BOD monitoring devices that can be used to open air |
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